A time will however come (as I believe) when physiology will invade and destroy mathematical physics, as the latter has destroyed geometry.

Money can buy a fine dog but it is kindness that makes him wag his tail.

I think, however, that so long as our present economic and national systems continue, scientific research has little to fear.

If materialism is true, it seems to me that we cannot know that it is true. If my opinions are the result of the chemical processes going on in my brain, they are determined by the laws of chemistry, not those of logic.

Until politics are a branch of science, we shall do well to regard political and social reforms as experiments rather than short-cuts to the millennium.

Shelley and Keats were the last English poets who were at all up to date in their chemical knowledge.

Haldane was engaged in discussion with an eminent theologian. "What inference," asked the latter, "might one draw about the nature of God from a study of his works?" Haldane replied: "An inordinate fondness for beetles."